#573E99
Closest named color: Blueberry (#464196). oklch(44.1% 0.142 292.2), rgb(87, 62, 153).
Aa
White text reads best on this color (8.22:1).
About this color
#573E99 is a dark, vivid purple. In OKLCH its lightness is 44%, its chroma 0.142 and its hue 292°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Blueberry (#464196), ΔE 0.029 away. White text reads best on it, at 8.22:1.
| Hue family | Purples |
| Lightness | dark (44%) |
| Chroma | vivid (0.142) |
| Temperature | in between |
| Nearest name | Blueberry (#464196) |
| Black text | 2.55:1 |
| White text | 8.22:1 |
Values
| HEX | #573E99 |
| RGB | rgb(87, 62, 153) |
| HSL | hsl(256, 42%, 42%) |
| OKLCH | oklch(44.1% 0.142 292.2) |
Contrast
WCAG 2 contrast ratios are the conformance target: AA needs 4.5:1 for body text and 3:1 for large text, AAA needs 7:1. APCA Lc values are supplementary guidance from the WCAG 3 drafts.
| Pair | WCAG 2 | Result | APCA | APCA guidance |
|---|---|---|---|---|
| White text on #573E99 | 8.22:1 | AAA | Lc -92.7 | Preferred for body text |
| Black text on #573E99 | 2.55:1 | Fails | Lc 15.9 | Dividers and decoration only |
| #573E99 text on white | 8.22:1 | AAA | Lc 88.1 | Fine for body text |
| #573E99 text on black | 2.55:1 | Fails | Lc -14.1 | Not readable |
Tints and shades
A 50–950 scale built in OKLCH: the hue is held, lightness follows a Tailwind v4-like curve, and every step is kept inside the sRGB gamut. This color sits at step 800.
-
Step 50
50
#F5F4FD
oklch(97% 0.012 291.3)
-
Step 100
100
#EAE7F9
oklch(93.6% 0.024 293.6)
-
Step 200
200
#D9D4F6
oklch(88.5% 0.047 292.2)
-
Step 300
300
#C1B7F2
oklch(80.8% 0.083 292.2)
-
Step 400
400
#A390EC
oklch(70.7% 0.133 292.1)
-
Step 500
500
#8E71E6
oklch(63.1% 0.17 292.2)
-
Step 600
600
#7956D4
oklch(55.5% 0.185 292.1)
-
Step 700
700
#6745B8
oklch(49.1% 0.173 292.5)
-
Step 800
800 (this color)
#573E99
oklch(44.1% 0.142 292.2)
-
Step 900
900
#443376
oklch(37.6% 0.11 291.9)
-
Step 950
950
#281E45
oklch(26.9% 0.071 292.9)
#573E99 with color blindness
Simulated with the Machado et al. (2009) model. ΔE is how far the color moves: below about 0.02 you would not notice a change.
| Vision | Seen as | Shift (ΔE) |
|---|---|---|
| Protanopia (no red cones) | #00509C | 0.092 |
| Deuteranopia (no green cones) | #0D4D97 | 0.088 |
| Tritanopia (no blue cones) | #455265 | 0.115 |
| Achromatopsia (no color) | #4F4F4F | 0.143 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #573E99
#573E99
oklch(44.1% 0.142 292.2)
- #545700
#545700
oklch(43.9% 0.097 112.1)
Analogous
Neighbouring hues, 30° either side.
Split complementary
The two hues beside the complement (150° and 210°).
Triadic
Three hues spaced 120° apart.
Palettes with this color
Curated palettes that contain a color within ΔE 0.04 (OKLab) of #573E99, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blueberry #464196 ΔE 0.029
- Rebecca Purple #663399 ΔE 0.034
- Dark Slate Blue #483D8B ΔE 0.035
- Twilight #4E518B ΔE 0.058
- Blue With A Hint Of Purple #533CC6 ΔE 0.073
- Bluey Purple #6241C7 ΔE 0.076
- Dusk #4E5481 ΔE 0.076
- Cobalt #1E488F ΔE 0.080
Use #573E99 in your product
Turn it into light and dark UI roles checked for contrast, then export to Tailwind v4, shadcn/ui, CSS or design tokens.